last line of the output of readAsciiTable

I have problem with the last line of the output of readAsciiTable see below
==

dat=readAsciiTable("data2011.txt",ncols,"float",3);
ncl 41> printVarSummary(dat)

Variable: dat
Type: float
Total Size: 17568 bytes
            4392 values
Number of Dimensions: 2
Dimensions and sizes: [183] x [24]
Coordinates:
Number Of Attributes: 1
  _FillValue : 9.96921e+36
ncl 42> print(dat(183,:))
fatal:Subscript out of range, error in subscript #0
fatal:An error occurred reading dat
fatal:Execute: Error occurred at or near line 42

ncl 43>
===

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Received on Wed Mar 21 16:33:35 2012